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Linux Kernel API Specification Framework Proposed To Help Stabilize User-Space Interfaces
Sasha Levin just sent out an initial 'request for comments' patch series for the Linux kernel in aiming to establish a Kernel API Specification Framework.
As outlined in previous discussions about kernel ABI stability, the lack of machine-readable API specifications has led to inadvertent breakages and inconsistent validation across system calls and IOCTLs. The framework provides three key components: declarative macros for specifying system call and IOCTL interfaces directly in the kernel source, automated extraction tools for generating machine-readable specifications, and a runtime validation infrastructure accessible through debugfs. The specifications capture parameter types, validation rules, return values, and error conditions in a structured format that enables both documentation generation and runtime verification.
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